Fuel-saving device



J. HYVERT FUEL SAVING DEVICE July 3, 1923.

Filed March 24, 1923 6 11 f, d/wi g Patented July 3%, i923.

JEAN nirvana, or sr. DENIS, SEINE, reason.-

FUELfiAVING DEVICE.

Application filed March 24, 1923. Serial No. 627,415.

To all whom it may concern: 7 i Be it known that I, JEAN Hrvnn'r, acitizen of the French Republic, residing at St. Denis, Seine, France, 27Rue Petit, have invented certain new and useful Improvements inFuel-Saving Devices, of which the following is a specification.

The present invention has for its object improvements relating to adevice for effecting a saving of fuel in internal combustion engines ofany suitable type, and is an improvement on the device of applicantscopending application, Serial Number 525,- 464:, filed Dec. 28th, 1921.

The objects of said improvements are to increase the efliciency of suchdevices and to more completely utilize the heat contained in the exhaustgases. For this purpose, in a first chamber in which water is vaporizedand dissociated, is located a nest of tubes which, in that part,replaces the exhaust pipe of the motor and through which, consequentlyflow the exhaust gases, the com-' bined cross sectional openings of thetubes of said nest being equal to the cross sectional area of theexhaust pipe.

According to another characteristic feature of the invention a. secondchamber is located in an exhaust gases collector, (which may be, in caseof need, specially arranged for that purpose). This collector contains acoil through which flows steam and products of decomposition of watercoming from the first chamber.

By that arrangement the heat contained in the exhaust products iseconomically used.

In the accompanying drawing is shown diagrammatically, partly in sectionby way of example a form of construction of the device which is theobjectof the invention.

The first chamber may be placed near the motor as shown in the drawing,but, of course, may be located in any suitable place with reference tothe motor, under condition however, of being placed as near thecylinders as possible in order to avoid losing heat. It may, in case ofneed, be directly bolted to the casing containing the second chamber.

On the drawing, M is the motor. The exhaust pipe 1 is interrupted atsome point of its length (as near the motor M as possible) where it isjoined to a nest of tubes 2. This nest may be made preferably of a heatcon ducting metal such as red copper, and the combined internal crosssectional area of the tubes of said nest is equal to the cross sectionalarea of pipe 1 in order to avoid any harmful resistance to the exhaust.At its other end, the nest of tubes 2 is joined to an extension 1" ofthe exhaust pipe, which ends in an exhaust tank (not shown).

The nest of tubes 2 is contained in a chamber 3which is the firstchamber of the device. At the top of this chamber over the nest 2, islocated a pipe 4: in which flows water to be decomposed. This pipe ispierced, with a plurality of small holes 5 through which drops of waterfall on the nest 2. At the base of the chamber 3 is mounted a blow-oilcock 6 adapted for evacuating any excess water which may accumulate atthe bottom of the chamber.

In an exhaust collector 7 of the motor M is located a coil 8 of a heatconducting metal, preferably of helical form in which flow steam andproducts of decomposition of water coming from the first chamber. Thecoil 8 is joined, on one side, with the box 3 by the pipe 9 fixed on theupper wall of said box, and on the other side, by the pipe 10, to theinlet valve (not shown) of the motor.

The normal arrangement of the exhaust collector 7 is not always adaptedfor locat ing the coil 8. When such is the case, the usual exhaustcollector of the motor is replaced by a chamber of a suitable form forthat purpose.

The working of the device according to the present invention is easilyunderstood: Water flowing through the pipe 4 is distributed by the holes5 onto the nest of tubes 2. This nest, through which flow the exhaustgases, is heated enough for completely 9 vaporizing water, and forproducing the dissociation of a portion of said water. Steam, hydrogenand oxygen thus obtained exhaust from the box 3 by the pipe 9 and comein the coil 8. The latter being in direct contact with the heat from thehot gases exhausting from the motor through the exhaust openings 11, isheated to a very high temperature, and owing to this temperature steamstill existing in the mixture is dissociated when said mixture flowsthrough the coil and consequently the tube 10 brings to the motor amixture of hydrogen and oxygen. Under these conditions the saving devicehas its highest efiiciency, and, as said rear before, the heat containedin the exhaust gases is used as completely as possible.

What I claim is 2-- A fuel economizer for internal combustion enginesfor use in combination with the exhaust pipe of an engine, comprising, achamber, a portion of exhaust pipe entering the chamber, a portion ofexhaust pipe leaving the chamber, a bundle of tubes, positioned in thechamber, and coinrnuncating the said exhaust pipe portions, and meansfor introducing a liquid into the chamber and onto the tubes, saidbundles of tubes having an aggregate cross sectional flow area at leastequal to that of one exhaust pipe portion, said means comprising aconduit positioned in the chamber and above said bundle of tubes, and aseries of apertures in the conduit, extending the entire length of thebundle of tubes, whereby to spray fluid onto the tubes.

In testimony whereof I have signed my name to this specification.

JEAN HYVERT.

